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10 Mon 'Niji-eijū'
| Issuer | Japan |
|---|---|
| Year | 1707 |
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| Composition | Copper (Copper alloy) |
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| Obverse description | Cast copper-alloy coin of round form with a central square perforation framed by a raised square boss. Two large kanji characters in bold raised relief are disposed vertically about the central aperture: 永 (ei, 'perpetual') above and 十 (jū, 'ten') below, both executed in a formal, legible script characteristic of Edo-period cast coinage. The broad flat field between the inner boss and the well-defined outer rim is entirely plain and unadorned. The raised outer rim is crisp and evenly cast, consistent with official Japanese monetary production practice of the early eighteenth century. |
|---|---|
| Obverse script | Log in to see details |
| Obverse lettering | 永 十 (Translation: `ei` ten) |
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| Additional information |
The Niji-eijū (二字永寿) is a subtype of the Kan'ei Tsūhō series, distinguished by the two-character "eijū" (永寿, meaning "eternal longevity") inscription cast into the reverse — a lucky phrase rather than a mint identifier. These pieces were struck under the monetary authority of the Tokugawa shogunate during a period when private and domain foundries were increasingly brought under centralized control, tightening who could legally cast coin.
1707 is also the year Mount Fuji erupted for the last time on record, the Hōei eruption, which devastated agricultural output across the Kantō plain and strained shogunal finances considerably.